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Force and Motion Set 1-3
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Gravity
Terms in this set (43)
Gravitational Force
the force of attraction between any two objects that have mass
newton
SI unit for weight
weight
the measure of the force of gravity
Fw = mg
formula for gravitational force (weight)
frictional force
the force that resists motion
air resistance
also known as drag
buoyant force
the force that pushes up an object in a fluid
Archimede's Principle
states that the amount of buoyant force is equal to the weight of the fluid it displaced.
Newton's 1st Law of Motion
an object at rest remains at rest unless acted on by an outside force; true for objects in motion
Newton's 1st Law of Motion
also known as the Law of Inertia
inertia
resistance to change of motion; dependent only on mass
Newton's Second Law of Motion
describes the relationship between net force, mass and acceleration; F = ma
force
a push or pull
newton (N)
SI unit for force
acceleration
how fast an object speeds up or slows down
mass
the amount of matter in an object
gram
SI unit for mass
meters/second/second (m/s/s)
SI unit for acceleration
Newton's Third Law of Motion
for every action, there is an equal and opposite reaction
net force
the sum total of all the forces acting on an object
balanced force
when the net forces are equal in magnitude and opposite in direction
unbalanced force
when the net forces are unequal in size and direction
action force
the initial force that is applied
reaction force
the force that responds to the initial force
density
the amount of matter in a certain amount of space
grams / cm3
SI unit for density
position
a location relative to an object
direction
the line on which an object moves
rate
a measure of something "per second"
scalar
a measurement that has magnitude only
vector
a measurement that has magnitude and direction
distance
how far an object is away from another object
meters
SI unit for distance
displacement
the net movement of an object; includes direction
temperature
the measure of the average energy of an object
Celcius or Kelvin
SI unit for temperature
time
the interval between two occurances
second
SI unit for time
speed
the rate at which an object moves a certain distance
formula for speed
speed = distance / time
meters/second
SI unit for speed and velocity
slope
rise over run; used to find speed on a distance-time graph
significant digits
the number of numbers actually measured in a lab
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